add average time to CM_Util::benchmarkMultiple()'s output
add average time to CM_Util::benchmarkMultiple()'s output

cargomedia/CM,fauvel/CM,fvovan/CM,fvovan/CM,alexispeter/CM,vogdb/cm,vogdb/cm,vogdb/cm,tomaszdurka/CM,fauvel/CM,njam/CM,vogdb/cm,tomaszdurka/CM,zazabe/cm,fauvel/CM,christopheschwyzer/CM,cargomedia/CM,njam/CM,mariansollmann/CM,mariansollmann/CM,njam/CM,njam/CM,zazabe/cm,zazabe/cm,fvovan/CM,vogdb/cm,tomaszdurka/CM,alexispeter/CM,tomaszdurka/CM,alexispeter/CM,christopheschwyzer/CM,tomaszdurka/CM,fvovan/CM,cargomedia/CM,cargomedia/CM,zazabe/cm,mariansollmann/CM,fauvel/CM,fauvel/CM,njam/CM,alexispeter/CM,mariansollmann/CM,christopheschwyzer/CM,christopheschwyzer/CM